CN210895113U - Thermal imaging system safety in production controlling means - Google Patents
Thermal imaging system safety in production controlling means Download PDFInfo
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- CN210895113U CN210895113U CN201922347636.4U CN201922347636U CN210895113U CN 210895113 U CN210895113 U CN 210895113U CN 201922347636 U CN201922347636 U CN 201922347636U CN 210895113 U CN210895113 U CN 210895113U
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Abstract
The utility model discloses a thermal imaging system safety in production controlling means mainly includes: the method mainly comprises the following steps: reaction, a thermal imager, a controller, an electric valve and a shell-and-tube constant temperature heat exchanger. The thermal imager is introduced, so that the safety production interlocking can be realized by controlling the temperature, the thermal image provided by the thermal imager can further judge the damage degree of the abnormal condition, and more intuitive and accurate data are provided for the treatment liquid of the abnormal condition. The abnormity can be found before the temperature alarm through the analysis of the thermal image, and the production risk and the economic loss are avoided.
Description
Technical Field
The utility model relates to a chemical industry equipment technical field especially relates to a thermal imaging system safety in production controlling means.
Background
The chemical industry plays an important role in the economy of all countries and even the world, and is the fundamental and the backbone industry of many countries. The development speed and scale of chemical industry have direct impact on various sectors of social economy, and the annual value of chemical products in the world has exceeded $ 15000 billion. Because chemical industry is various in types, complex in process and various in products, severe chemical reaction is often accompanied in production, and raw materials and products in chemical production are mostly inflammable, explosive and toxic and corrosive substances, once an accident occurs, serious casualties and economic losses are generated, and secondary damage also brings long-term pollution to the environment. The safety production of the chemical industry is important.
Along with the enhancement of public safety consciousness, the control on the industrial safety production of chemical engineering and the like is also scaled daily. In chemical production, high temperature, high pressure and explosion leakage caused by violent reaction are key points for safety prevention of chemical production, at present, safety production control is realized through safety interlocking of conventional parameters such as temperature, flow, pressure and the like, and the safety interlocking generally adopts control systems such as ESD, DCS, PLC and the like.
The conventional temperature interlocking device is a facility for protecting safety production by performing a series of logical operations when a temperature signal reaches a set interlocking value in a control loop and starting specific operations such as temperature rise and drop by controlling a valve switch. The temperature interlocking is visual embodiment of reaction conditions, is simple to operate, is generally used for safety production control in the chemical industry, but due to the reasons of uneven reaction temperature in a reaction container and the like, the temperature interlocking causes the conditions of false report and missed report, and due to the fact that specific reaction state data of all parts in the container are not available, an effective processing scheme cannot be given to the production which is subjected to temperature interlocking control in time for processing.
Disclosure of Invention
To the aforesaid not enough, the utility model provides a thermal imaging system safety in production controlling means, this device can be used to polymerization, the production of normal pressure reaction such as neutralization.
The technical scheme of the invention is as follows: a thermal imager safety production control device comprises a reaction kettle, wherein a thermal imager is installed on the reaction kettle, the thermal imager is connected with a controller in a linked mode, and the controller is connected with a raw material storage tank through an electric valve;
the shell-and-tube type constant temperature heat exchanger lower extreme is equipped with the import and passes through pipeline connection with the left export of first tee bend, and the upper end is equipped with the export, passes through pipeline connection with the left import of second tee bend, import and hot water supply pipe pass through pipeline connection on the first tee bend, and right import and cooling water supply pipe pass through pipeline connection, export and hot water return water pipe pass through pipeline connection on the second tee bend, and right export and cooling water return water pipe pass through pipeline connection.
The thermal imager is connected with the controller through an electric wire, the controller is connected with the electric valve through an electric wire, and the upper opening of the electric valve is connected with the raw material storage tank through a pipeline.
The thermal imager probe is fixed on a horizontal distance connecting line between a feeding hole of the reaction kettle and the center of the reaction kettle, and the outer wall of the thermal imager probe is made of PVC material in the range of 2/3-3/4 of the horizontal distance connecting line close to the center.
The controller comprises one of a PLC and an ESP safety interlocking controller.
The feed inlet of the reaction kettle can be one or more.
The pipeline that import and right import and corresponding pipe connection are gone up in first tee bend (6) and are established ties and have valve and circulating pump, establish ties on the pipeline that third tee bend (8) left side export and right export and corresponding cauldron are connected has valve and transmission pump, all establishes ties on the pipeline that other devices are connected has the valve.
The invention has the advantages that
The utility model discloses the device not only can realize the safety in production interlocking through the control to the temperature through introducing the thermal imaging system, and the thermal image that it provided can further make the degree of harm to the abnormal conditions and make the judgement, and it provides more directly perceived accurate data to the processing liquid of the abnormal conditions. The abnormity can be found before the temperature alarm through the analysis of the thermal image, and the production risk and the economic loss are avoided.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
In fig. 1: 1. the system comprises a reaction kettle, 101, a feed inlet, 102, a thermal imager probe inlet, 103, a gas outlet, 104, a discharge outlet 2, a thermal imager, 3, a controller, 4, an electric valve, 5, a shell-and-tube constant temperature heat exchanger, 501, an inlet, 502, an outlet, 6, a first tee joint, 7, a second tee joint, 8 and a third tee joint.
Detailed Description
The present invention will be further described with reference to the following detailed description and fig. 1.
A thermal imager safety production control device mainly comprises: the device comprises a reaction kettle 1, a thermal imager 2, a controller 3, an electric valve 4 and a shell-and-tube type constant temperature heat exchanger 5, and is characterized in that the shell-and-tube type constant temperature heat exchanger 5 is arranged on the outer wall of the reaction kettle, a feed inlet 101, a thermal imager probe inlet 102 and a gas outlet 103 are arranged at the upper end of a mixing kettle, a discharge outlet 104 is arranged at the lower end of the mixing kettle, the feed inlet 101 is connected with the lower port of the electric valve through a pipeline, the thermal imager probe inlet is hermetically and fixedly embedded with a thermal imager probe 201, the gas outlet is connected with a tail gas absorption device through a pipeline, the discharge outlet is connected with the upper inlet of a third tee joint 8 through a pipeline, the left outlet of;
the thermal imager is connected with the controller through an electric wire, the controller is connected with the electric valve through an electric wire, and the upper opening of the electric valve is connected with the raw material storage tank through a pipeline;
the shell-and-tube type constant temperature heat exchanger lower extreme is equipped with import 501 and passes through the pipeline connection with the 6 left exports of first tee bend, and the upper end is equipped with export 502, passes through the pipeline connection with the 7 left imports of second tee bend, import and hot water supply pipe pass through the pipeline connection on the first tee bend, and right import and cooling water supply pipe pass through the pipeline connection, export and hot water return water pipe pass through the pipeline connection on the second tee bend, and right export and cooling water return water pipe pass through the pipeline connection.
Furthermore, the thermal imager probe is fixed on a horizontal distance connecting line between the feed port of the reaction kettle and the center of the reaction kettle, and the outer wall of the thermal imager probe is made of PVC material in the range of 2/3-3/4 of the horizontal distance connecting line close to the center.
Further, the controller can be a safety interlocking controller such as a PLC, an ESP and the like.
Furthermore, the number of the feed inlets of the reaction kettle can be 1-n, n is an integer larger than 1, and the feed inlets are numbered as (101-1) - (101-n) in sequence.
Furthermore, a valve and a circulating pump are connected in series on a pipeline, connected with a corresponding pipeline, of an inlet and a right inlet of the first tee joint, a valve and a transmission pump are connected in series on a pipeline, connected with a corresponding kettle, of a third communicated left outlet and an outlet, and valves are connected in series on pipelines connected with the rest of the devices.
Example 1
Dropwise adding sodium hydroxide alkali liquor into dilute sulfuric acid for neutralization
(setting the normal dropping reaction temperature range to be 40-65 ℃, alarming when the temperature exceeds the upper limit, starting interlocking to stop dropping, and alarming when the temperature is lower than the lower limit).
1960kg of sulfuric acid with the mass fraction of 30% is added into the reaction kettle (1), and 1600kg of sodium hydroxide aqueous solution with the mass fraction of 30% is added into the reaction kettle from a feed inlet (101-1) of the reaction kettle at a constant speed according to the flow rate of 800kg/h for neutralization reaction.
And (3) when the temperature is abnormal in the dripping reaction process, starting in a chain manner and giving an alarm, and performing the following analysis and treatment according to the display imaging of the thermal imager.
And in the case 1, the temperature distribution is uniform and is lower than 40 ℃, the alkali liquid drop addition is insufficient, whether the alkali tank allowance is insufficient, whether the dropping valve is blocked, whether the material beating pump or the flow meter is in fault or not is checked, corresponding maintenance and replacement treatment is carried out, and the alkali liquid is continuously dropped.
And 2, after the temperature distribution is more uniform and higher than 65 ℃, after the dropwise addition is stopped, cooling the reaction kettle by a cooling system, checking whether a flowmeter is in failure, whether a pipeline is leaked, whether human operation is wrong, and after the reason is checked and corrected, continuing dropwise adding alkali liquor after the thermal imager displays that the temperature in the reaction kettle is reduced to below 65 ℃ and is uniformly distributed.
Case 3, the temperature is higher than 65 ℃ only at the dropping position, and the temperature is lower the further the rest is from the dropping center, so that the cooling system does not need to be started in the case, and other treatments are the same as the treatment mode of case 2.
Example 2
Acrylic acid polymerization
(monomer and initiator are respectively dripped, the normal dripping reaction temperature range is set to be 80-95 ℃, the temperature exceeds the upper limit alarm and starts interlocking to stop dripping, and the temperature is lower than the lower limit alarm)
Adding 500kg of pure water and 10kg of sodium persulfate into a reaction kettle (1), stirring and dissolving, heating the reaction kettle to 85 +/-2 ℃ through a heat exchanger (5), then adding 1600kg of acrylic acid from a reaction kettle feed inlet (101-1) at a constant speed according to the flow of 800kg/h, adding 180kg of sodium persulfate aqueous solution with the mass fraction of 15% from the reaction kettle feed inlet (101-2) at a constant speed according to the flow of 90kg/h for polymerization reaction, and after the dropwise addition, preserving the heat for 2h and discharging.
And (3) when the temperature is abnormal in the dripping reaction process, starting in a chain manner and giving an alarm, and performing the following analysis and treatment according to the display imaging of the thermal imager.
And 1, the temperature distribution is uniform and is higher than 95 ℃, the temperature of a heat exchanger is 85 ℃, interlocking starting is carried out, dripping is stopped, heating is stopped, explosive aggregation and material flushing are avoided, and after the thermal imager displays that the temperature in the reaction kettle is uniform and is reduced to be lower than 95 ℃, the dripping of the materials is continued to react.
And 2, the temperature distribution is not uniform, the temperature of a part of small range is higher than 95 ℃, the temperature of a heat exchanger is 83 ℃, the interlocking start is carried out, the dropwise addition is stopped, the continuous stirring is carried out to uniformly mix the materials in the reaction kettle, and after the thermal imager displays that the temperature in the reaction kettle is uniform and is reduced to be below 95 ℃, the dropwise addition of the materials is continued for reaction.
And 3, the temperature in the reaction kettle is 81 ℃ uniformly, the temperature of the heat exchanger is 81 ℃, the temperature of the reaction kettle is equivalent to that of the heat exchanger, and in the set temperature range, in this case, although the alarm is not given, the dripping is stopped, the heating is stopped, and whether the dripping of the materials fails is checked. The specific situation is as follows:
if the initiator and the monomer are not dripped, after the maintenance and the dripping device, the dripping reaction is continued;
if one of the initiator or the monomer is not dripped, after the dripping device is maintained, the dripping shortage can be calculated according to the residual amount of the storage tank, and the dripping is reset for reaction;
if the initiator and the monomer are both normally dripped, the enrichment of reactants is proved to be unreacted, the explosion is easily caused by implosion at the moment, a cooling device is started, and after the temperature is reduced, the materials in the kettle are dripped again for reaction.
The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (6)
1. A thermal imager safety production control device comprises a reaction kettle (1), wherein a thermal imager (2) is installed on the reaction kettle (1), the thermal imager (2) is connected with a controller (3), the controller (3) is connected with a raw material storage tank through an electric valve (4), and the thermal imager safety production control device is characterized in that a shell-and-tube type constant temperature heat exchanger (5) is arranged on the outer wall of the reaction kettle (1), a feed inlet (101), a thermal imager probe inlet (102) and a gas outlet (103) are arranged at the upper end of the reaction kettle (1), a discharge outlet (104) is arranged at the lower end of the reaction kettle, the feed inlet (101) is connected with the lower port of the electric valve (4) through a pipeline, the thermal imager probe inlet (102) is fixedly embedded with a thermal imager probe (201) in a sealing manner, the gas outlet (103) is connected with a tail gas absorption device through a pipeline, the discharge outlet (104) is connected with the, the right outlet of the third tee joint is connected with the waste treatment tank through a pipeline;
the shell-and-tube type constant temperature heat exchanger lower extreme is equipped with import (501) and passes through pipeline connection with the left side export of first tee bend (6), and the upper end is equipped with export (502), passes through pipeline connection with the left side import of second tee bend (7), import and hot water supply pipe pass through pipeline connection on first tee bend (6), and right import and cooling water supply pipe pass through pipeline connection, export and hot water return water pipe pass through pipeline connection on second tee bend (7), and right export and cooling water return water pipe pass through pipeline connection.
2. The thermal imager safety production control device according to claim 1, characterized in that the thermal imager (2) is connected with the controller (3) through an electric wire, the controller (3) is connected with the electric valve (4) through an electric wire, and the upper opening of the electric valve (4) is connected with the raw material storage tank through a pipeline.
3. The thermal imager safety production control device according to claim 1, characterized in that the thermal imager probe is fixed on a horizontal distance connecting line between a feeding port of the reaction kettle and the center of the reaction kettle, and the outer wall of the thermal imager probe is made of PVC material within 2/3-3/4 of the horizontal distance connecting line close to the center.
4. The thermal imager safety production control device of claim 1, wherein the controller comprises one of a PLC and an ESP safety interlock controller.
5. The thermal imager safety production control device according to claim 1, wherein the number of the reaction kettle feed inlets can be one or more.
6. The thermal imager safety production control device according to claim 1, characterized in that the pipelines connecting the upper inlet and the right inlet of the first tee joint (6) with the corresponding pipelines are connected in series with valves and circulating pumps, the pipelines connecting the left outlet and the right outlet of the third tee joint (8) with the corresponding kettles are connected in series with valves and transmission pumps, and the pipelines connecting the other devices are connected in series with valves.
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| CN201922347636.4U CN210895113U (en) | 2019-12-24 | 2019-12-24 | Thermal imaging system safety in production controlling means |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113934244A (en) * | 2021-09-27 | 2022-01-14 | 浙江大华技术股份有限公司 | Temperature control system and temperature control method |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113934244A (en) * | 2021-09-27 | 2022-01-14 | 浙江大华技术股份有限公司 | Temperature control system and temperature control method |
| CN113934244B (en) * | 2021-09-27 | 2022-07-22 | 浙江大华技术股份有限公司 | Temperature control system and temperature control method |
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Address after: No.1, Shiliquan East Road, Shizhong District, Zaozhuang City, Shandong Province 277100 Patentee after: Shandong Taihe Technology Co.,Ltd. Address before: 277000 No.1, Shiliquan East Road, Shizhong District, Zaozhuang City, Shandong Province Patentee before: SHANDONG TAIHE WATER TREATMENT TECHNOLOGIES Co.,Ltd. |
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